Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
193979111Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
4231819909256396556172168.52015-09-07 19:55:11
History
DateUserTypeResult
2015-09-07demfloroF
Factor: 423181990925639655617 / TF: 68-69
2015-09-07demfloroNF
no factor from 2^66 to 2^68
2013-06-23RichardNF
no factor from 2^65 to 2^66
2011-04-18megavinkNF
no factor from 2^64 to 2^65
2010-08-05Torchwood InstituteNF
no factor from 2^63 to 2^64